Lighting fixture



March 5, 1935. D. G. 5MP 1,993,385

LIGHTING FIXTURE Filed June 19, 1933 Z atenteci 5,

i'i'ED STAES PATENT OFFICE LEGHTKNG FIXTURE Eli-k G. Saai, Chicago, ill,assignmto Goodrich iiiectrie Qompany. Chicago, 111., a corporation ofZllinois Application June 19, 1933, Serial No. 676,432

Claims.

5 a new and improved fixture of this character embodying a supportingmeans and a detachable reflector and lamp holding means so that thereflector and lamp may be readily detached as a unit from the supportingmeans.

Another object is to provide a novel lighting fixture wherein thereflector holder and lamp socket are detachable as a unit from thesupport ing structure, together with new and improved means for securingthe detachable unit to the supporting structure.

Other objects will become readily apparent from the following detaileddescription taken in connection with the accompanying drawing, which:

Fig. 1 is a fragmentary vertical central section through a preferredform of the invention.

Fig. 2 is a view looking at the bottom of, the supporting structure. A a

3 is a view looking at the top of the detachable unit.

While I have shown in the drawing and shall herein describe in detail apreferred embodiment of the invention, it is'to be understood that I donot thereby intend to limit the invention to the specific form andarrangement shown, but aim to cover all modifications and alternativeconstructions falling within the spirit and scope of the invention asexpressed in the appended claims.

As illustrated in the drawing, the invention comprises generally asupporting structure or unit A and a detachable unit B, the supportingstructure comprising an inverted cup-shaped member 5 adapted at itsupper end for connection to a conduit 6, although it is to be understoodthat various forms of attaching or mounting means may be provided as theparticular type of installation may require. A wiring base 7' is securedwithin the member 5 and carries resilient contacts 8 and 9 to which linewires 8 and 9 are connected. As illustrated most clearly in Fig. 2, thecontact 8 has its projecting end 8 positioned centrally of the member 5and the contact 9 has its projecting end 9' disposed radi allytherefrom. The lower end of the member 5 is preferably provided with aflange having an outwardly extending portion 10 and a downwardlyextending portion 11 forming an annular recess 12 into which the upperend of the unit B is adapted to fit.

- 'ects.

crimped inwardly at 20 so as to provide an an- 10 In the preferred formof the invention, the detachable unit B comprises a tubular holder 15which may be adapted at its lower end for supporting a reflector or.other device (not shown),

a lamp socket 16 and a lamp 17. The holder 6 has an inwardly extendingflange 18 at its upper end leaving a circular opening 19 through which acylindrical portion 16' of the lamp socket pro- The wall of the holder15 is preferably nular flange or bead 21 which fits into the recess 12of the supporting member 5. V

The socket 16 is preferably mounted on the holder 15 in a yieldablemanner. As illustrated most clearly in Fig. 1, tubular rivets 25 extend15 through apertures in the flange 18 of the holder and through ears 26formed integrally with the socket. These rivets are upset at their upperand lower ends, coiled springs 27 being inserted between the lower endsof the rivets and the cars 26. The socket 16 has the customary screwthreaded contact 28 and a resilient center contact 29, the centercontact being connected by means of a screw device 30 to a contact 31pcsitioned centrally of the upper end of the socket so as to beengageable with the wiring base contact 8'. The contact 28is'suitablyconnected to a ring contact 32 carried adjacentthfe'periphery of the upper end of the socket by screw devices 28' (Fig.3) so as to be engageable with the wiring base contact 9' irrespectiveof the angular position of the holder. I I

For the purpose of securing the unit B detachably to the supportingstructure A, an inturned ledge 35 may be formed on the supporting mem-35 ber 5 so as to underlie aportion of the bead 21. This ledge and headform interengaging means functioning as a hinged joint which is readilyseparable when the detachable unit is swung away from its normalinstalled position to permit complete removal of the detachable unitfrom the supporting structure. A latch device is preferably provided onthe opposite side of thesupporting member. As illustrated herein alooking member or pin 36 is slidably mounted in an inclinedbore 37, andis normally spring pressed outwardly by means of a coiled spring 38, theoutward movement of the pin being limited by a disk-like operatinghandle 39. Theend of the pin 36 projects into the recess 12 so as tounderlie the bead 21, the angle at which the bore 37 is positioned beingsuch that when the unit B is installed as illustrated in Fig. 1 it isnecessary to withdraw thevpin- 36 manually before the adjacent edge ofthe holder 15 may be swung downwardly.

.In installing the detachable unit B it is merely necessary to tip thedetachable unit while inserting a portion of the bead 21 over the ledgeand thereafter swinging the unit so that the bead at the opposite sideof the holder passes up over the end of the pin 36, the pin yieldingagainst the force of the spring. The contacts 31 and 8' are positionedso that they engage each other during this operation and similarly thecontacts 32 and 9' engage each other, the contact 32 being preferably inthe form of a ring so as to engage properly with the contact 9'irrespective of the angular position of the unit B with respect to thesupporting structure A about a vertical axis.

It will be readily apparent that by withdrawing the pin 36, the unit B,comprising the holder 15 and the parts secured thereto, may be readilydetached from the supporting structure. This not only facilitatesinstallation of the supporting structure, since the wires may then bedrawn into the member 5 and properly attached to the contacts 8 and 9,but thereafter the fixture holder and lamp socket may be readilydetached 'for purposes'of cleaning or replacement. I v a I claim as myinvention:

1. A lighting flxture comprising a supporting unit and a detachablereflector unit, said supporting unit comprising an inverted cup-shapedmember and a wiring base in said member havingwiring-terminals and apair of yieldable contact members, said reflector unit comprising atubular holder having an annular flange at its upper end adapted to bepositioned against the lower portion of the supporting unit, a lampsocket permanently carried on said holder and having a portionprojecting upwardly therefrom provided with contacts adapted to engagethe contact members of said wiring base to establish a circuit when theholder is installed in operative position,. and means for detachablysecurthe holder to 'the supportingunit including a spring pressed pinslidably mounted on the supporting member adapted to engage under theflange of the holder, said pin yielding when the holderis inserted andbeing withdrawable manually to detach the holder.

2. A lighting fixture comprising a supporting unit and a detachablereflector unit, said supporting unit comprising an inverted cup-shapedmem her and a wiring base in said member having circult terminals, and apair of yieldable contact members, said reflector unit comprising atubular holder having an annular flange at its upper end adapted to bepositioned against the lower portion of the cup-shaped member, a lampsocket permanently carried on said holder and having a portionprojecting upwardly therefrom pro vided with contacts adapted to engagethegcom, tact members of said wiring base to complete the circuittherebetween when the holderlis in-' stalled in operative position, andmeans for detachably securing the holder to the cup-shaped memberincluding means extending from the lower edge of said supporting memberarranged to engage under said flange at one side of said holder so asto-torm a hinged joint readily separable when the holder is swung awayfrom its normal installed position to permit complete removal of theholder from the cup-shaped member, and a latch device comprising aspring pressed pin slidably mounted on the opposite portion of thecup-shaped member adapted to engage under the flange of the holder.

3. A lighting fixture comprising a supporting unit and a detachableunit, said supporting unit comprising a supporting member and a wiringbase on said member having circuit terminals and a pair of laterallyspaced contact members connected thereto, said detachable unitcomprising a tubular holder adapted to be positioned against the lowerportion of the supporting member, a lamp socket permanently carried onsaid holder and having a portion projecting there- 'from provided withlaterally spaced contacts adapted to engage the contact members of saidY wiring base to complete the circuit therebtween and means fordetachably securing theholder to the supporting member comprisinginterengaging means on said supporting member and bolder arranged toform a. hinged joint readily separable when the holderis swungaway fromits normal installed position to permitcomplete removal of the holderfrom thesupporting member, and a latch device comprising a springpressed pin slidably mounted on the supporting member adapted to engageunder the flange of the holder, said pin yielding when the' holder isinserted and being withdrawable manually to detach the holder.

4. A lighting fixture having, in combination, a supporting unitcomprising an inverted cupshaped housing and a wiring base in saidhousing provided with a pair of readily engageable contacts, adetachable unit comprising a tubular 5. A lighting fixture having, incombination, a

supporting unit comprising an inverted cupshaped housing and'awiring'base insaid housing provided with a pair of readily engageablecontacts, a detachable unit comprising a holder and a lampsocketsecuredpermanently to said holder and having contacts adapted to engagesaid wiring base contacts when said detachable 'unit is secured tosaidsupporting unitto complete a circuit between said units, saidcontacts being readily disengageable when the detachable unit isremoved, and means for securing the detachable unit to the supportingunit comprising interengaging means on said units at one side thereofforming a hinged joint readily separable when the holder is swung fromits normal installed position to permit the. complete removal of thedetachable unit from the supporting unit, and a latch device oppositesaid joint automatically engaged when the holder is swung to itsoperative installed position.

DIRK G. SAAF.

